Official Vim patches

For released versions patches are made available. These fix small or big
problems. Only source code patches are provided.

The patches for released versions of Vim are
here.
An overview of what each patch solves is in a README file.
For Vim 7.4 it is this
README file.

To apply a patch, you must get the sources, go to the directory where the
"src" directory is located and apply the patch with:
patch -p0 < patchfile>&logfile
To apply multiple patches you can concatenate them and pass the resulting file
to the patch program. It's a good idea to redirect the output to be able to
check for error messages.

Using Aap

An alternative way to build Vim with the latest patches is by using Aap.
This is still experimental, but many people have reported it works well.

Aap will fetch the original distribution and then apply all the available
patches. You can repeat this later and only the new patches are downloaded and
applied. You do not need to type URLs, everything is taken care of
automatically. It does require installing Aap.

The detailed explanation can be found
here.
Please report problems to Bram AT a-a-p.org.